# cytoolz > Cython implementation of Toolz: High performance functional utilities - **URL**: https://www.freshcrate.ai/projects/cytoolz - **Author**: CyToolz contributors - **Category**: RAG & Memory - **Latest version**: `1.1.0` (2026-04-21) - **License**: Unknown - **Source**: https://github.com/pytoolz/cytoolz/releases - **Homepage**: https://pypi.org/project/cytoolz/ - **Language**: Python - **GitHub**: 1,108 stars, 76 forks - **Registry**: pypi (`cytoolz`) - **Tags**: `curry`, `functional`, `functools`, `generator`, `iterator`, `itertools`, `memoize`, `pypi`, `utility` ## Description CyToolz ======= |Build Status| |Version Status| Cython implementation of the |literal toolz|_ `package, `__ which provides high performance utility functions for iterables, functions, and dictionaries. .. |literal toolz| replace:: ``toolz`` .. _literal toolz: https://github.com/pytoolz/toolz ``toolz`` is a pure Python package that borrows heavily from contemporary functional languanges. It is designed to interoperate seamlessly with other libraries including ``itertools``, ``functools``, and third party libraries. High performance functional data analysis is possible with builtin types like ``list`` and ``dict``, and user-defined data structures; and low memory usage is achieved by using the iterator protocol and returning iterators whenever possible. ``cytoolz`` implements the same API as ``toolz``. The main differences are that ``cytoolz`` is faster (typically 2-5x faster with a few spectacular exceptions) and ``cytoolz`` offers a C API that is accessible to other projects developed in Cython. Since ``toolz`` is able to process very large (potentially infinite) data sets, the performance increase gained by using ``cytoolz`` can be significant. See the PyToolz documentation at https://toolz.readthedocs.io and the full `API Documentation `__ for more details. *CyToolz has experimental support for Python free-threading introduced in Python 3.13 and provides wheels for free-threaded Python. CyToolz has not yet been developed or tested for thread-safety, so use at your own risk! If you encounter any issues, please* `let us know `__. LICENSE ------- New BSD. See `License File `__. Install ------- ``cytoolz`` is on the Python Package Index (PyPI): :: pip install cytoolz Dependencies ------------ ``cytoolz`` supports Python 3.9+ with a common codebase. It is developed in Cython, but requires no dependecies other than CPython and a C compiler. Like ``toolz``, it is a light weight dependency. Contributions Welcome --------------------- ``toolz`` (and ``cytoolz``) aims to be a repository for utility functions, particularly those that come from the functional programming and list processing traditions. We welcome contributions that fall within this scope and encourage users to scrape their ``util.py`` files for functions that are broadly useful. Please take a look at our issue pages for `toolz `__ and `cytoolz `__ for contribution ideas. Community --------- See our `mailing list `__. We're friendly. .. |Build Status| image:: https://github.com/pytoolz/cytoolz/actions/workflows/test.yml/badge.svg?branch=master :target: https://github.com/pytoolz/cytoolz/actions .. |Version Status| image:: https://badge.fury.io/py/cytoolz.svg :target: http://badge.fury.io/py/cytoolz ## Recent releases | Version | Date | Urgency | Changes | | --- | --- | --- | --- | | `1.1.0` | 2026-04-21 | Low | Imported from PyPI (1.1.0) | | `1.1.0a2` | 2025-10-17 | Low | _**This is a pre-release**_ - Add support for Python 3.14 - Drop support for Python 3.8 - Update to match `toolz` 1.1.0 - Package, tooling, infrastructure modernization Full release notes will be included for 1.1.0 | | `1.1.0a1` | 2025-10-17 | Low | _**This is a pre-release**_ - Add support for Python 3.14 - Drop support for Python 3.8 - Update to match `toolz` 1.1.0 - Package, tooling, infrastructure modernization Full release notes will be included for 1.1.0 | | `1.1.0a0` | 2025-10-17 | Low | _**This is a pre-release**_ - Add support for Python 3.14 - Drop support for Python 3.8 - Update to match `toolz` 1.1.0 - Package, tooling, infrastructure modernization Full release notes will be included for 1.1.0 | | `1.0.1` | 2024-12-13 | Low | - Add support for Python 3.13 by @eriknw in #216 | | `1.0.0` | 2024-10-04 | Low | ## What's Changed * Test fixes for Python 3.13 by @opoplawski in https://github.com/pytoolz/cytoolz/pull/206 * Drop Python 3.7 by @jrbourbeau in https://github.com/pytoolz/cytoolz/pull/207 * Bump ``cibuildwheel`` in CI by @jrbourbeau in https://github.com/pytoolz/cytoolz/pull/208 ## New Contributors * @opoplawski made their first contribution in https://github.com/pytoolz/cytoolz/pull/206 * @jrbourbeau made their first contribution in https://github.com/pytoolz/cytoolz/pull/207 **Full | | `0.12.3` | 2024-01-25 | Low | - Add support for Python 3.12, PyPy 3.9, and PyPy 3.10 - Update to match `toolz` 0.12.1 | | `0.12.3a2` | 2024-01-24 | Low | _**This is a pre-release**_ - Support Python 3.12 - Match `toolz` 0.12.1 - Fix docstring to match `toolz` - Don't run "release" tests on PyPy when building wheels | | `0.12.3a1` | 2024-01-24 | Low | _**This is a pre-release**_ - Support Python 3.12 - Match `toolz` 0.12.1 - Fix docstring to match `toolz` | | `0.12.3a0` | 2024-01-24 | Low | _**This is a pre-release**_ - Support Python 3.12 - Match `toolz` 0.12.1 | ## Citation - HTML: https://www.freshcrate.ai/projects/cytoolz - Markdown: https://www.freshcrate.ai/projects/cytoolz.md - Dependencies JSON: https://www.freshcrate.ai/api/projects/cytoolz/deps _Generated by freshcrate.ai. Indexes pypi releases for AI-agent ecosystem packages._